Bravo pH Monitoring System 40 User Guide
chapter.fm 3/21/16 4:05 pm
5.5 x 7.75 inches (140 mm x 197 mm)
Table 3. Recommended separation distances between portable and mobile electromagnetic communication
equipment and Bravo recorder
Bravo recorder is intended for use in an electromagnetic environment in which radiated
electromagnetic disturbances are controlled. The customer or the user of the Bravo recorder can help
prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile communication equipment (transmitters) and the Bravo recorder as recommended below,
according to the maximum output power of the communication equipment.
Rated maximum output
power of Transmitter W
80 to 412.224
MHz
412.224 to
455.616 MHz
455.616 to 800
MHz
800 MHz to 2.5 GHz
d = 1.2 P d = 1.2 P d = 1.2 P d = 2.3 P
0,01
0.12 0.12 0.12 0.23
0,1
0.38 0.38 0.38 0.74
1
1.2 1.2 1.2 2.3
10
3.8 3.8 3.8 7.4
100
12 12 12 23
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters
(m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output
power rating of the transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1: At 80 and 800 MHz, the separation distance for the higher frequency range applies.
NOTE 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
NOTE 3: In the band 412.224 to 455.616 MHz, Bravo recorder in Rx mode has no immunity against electromagnetic
energy in order to perform its intended function. Nearby electronic equipment may affect the system. Immunity within
this band is provided in upload mode of operation only.
Table 4. Transmitter requirements
Description Specification
Operating frequency
433.9 MHz
Transmission type
Amplitude shift key (ASK)
Effective radiated power
29.7 µW
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